It's very sad to confirm that greed and blindness prevails.
These "Big 5" are fighting for business as usual when business as usual is dead! This is a movie we've already seen. Back in the mid 50's, Hollywood started a fight against TV. They shot this spectacular films (Cleopatra, Ben-Hur, etc) looking forward to present amazing things that the TV would never be able to reproduce on its little screen. It was a lost battle. Hollywood had to reinvent themselves. Until then, they struggled in a battle against TV which was lost before it even started. The new media--the TV--had come to stay, and people abandoned the enormous movie theatres.
It's the same with eBooks. They're here to stay. It's the future of books. Will printed books disappear? Not in our lifetime, and maybe not ever. However, the eBook, as the TV did, represents a new media that must be considered. My granddad talks about the times when you went to movie theatres to watch newscasts. Not live like TV newscasts, but recorded ones that ran all during a week. This feature moved out to the TV because people preferred to watch live newscasts, but we still watch The Age of Ultron in movie theatres. This means that some movie studies reinvented themselves to remain alive.
Sames with eBooks. Printed books will continue to be the preferred medium in cases in which touching the thing is important, like children pop-up books, or books for blind people. Printed books will still be used in countries where technology has not arrived yet or is not affordable. However, in first world countries, anything that can be read on tablet or on a smartphone will be, because it's practical and easier. The big 5 have to live with that.
The prob is the Big 5 don't want to live with that because they still believe they can profit more from printed books than from eBooks. That's call greed. If they don't reinvent themselves, there will be a sixth one who will understand the value of eBooks, who will dedicate themselves to "printing" and marketing eBooks, and who will get very rich. Few people will buy eBooks as expensive as printed books, but they will buy cheap eBooks, with stories as good as the expensive ones, from indie authors or from the big Sixth.
Out of the other 5, only one or two will survive because they never adapter to the new media. That's called blindness.
Kiss
Gacela